p0442
Easy Fix
Toyota · Sedans
EVAP System Small Leak Detected
Quick Answer
Error code P0442 on your Toyota Sedans means: EVAP System Small Leak Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Avalon XLE 2022Camry XSE 2024Camry Hybrid SE 2024Corolla SE 2024Corolla Hybrid LE 2024Crown Platinum 2024Mirai Limited 2024Prius XLE 2024Camry LE 2023Camry LE 2024Camry SE 2023Camry SE 2024Camry TRD 2024Camry XLE 2024Corolla LE 2023Corolla LE 2024Corolla XSE 2024Crown Limited 2024Crown XLE 2024Prius LE 2024Prius Limited 2024
Likely Causes
How to Fix It
1
Inspect and tighten or replace the gas cap and clear the code
2
Perform a smoke test on the EVAP system to locate the leak
3
Inspect all EVAP hoses and connections for cracks or loose fittings
4
Check purge valve and vent valve for proper sealing
5
Inspect fuel filler neck and fuel tank seals for deterioration
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Gas cap
EVAP hoses
Purge valve
Vent valve
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